Sewer-pipe.



PATENTED JUNE 12, 1906. P. E. SHAW. I SEWER PIPE. APPLICATION FILED mums, 1904. RENEWED MAY 5,1906.

TNESSES INVENTOR ATTY 'sai wire-netting. .Then anot 'terstices between them. When a considerable layer E has been thus spread, a wire netting, or mesh F is laced on said concrete layer E, and near t e ends of the section pieces of wires G, having at one end open 100 s, are fastened at, their op )osite' ends to er layer H of concrete is spread upon the wire-netting and through the meshes of said netting unites with the concretelayer E into one homo eneous mass therewith, thus embedding tie wire-netting F. The outer surface of the concrete layer H is formed in contact with the inner surfaces of the outer segments I I of the mold. This invert so constructed is then dried in the mold and forms one solid semitubular sewer-section. When removed, it is found to consist of a seniitubular mass of concrete, having an intermediate or einb edded layer of wire-netting F and provided with a smooth practically continuous surface of stone on its inner or concave side, which stone surface constitutes what may be termed an armor. This semitubular armored invert is then placed in another mold, (illustrated in Fig. 2,) consisting, referably, of two semitubular portions J hinged together, as shown at a, and provided with a locking device b. This locking device comprises a screw-threaded tongue pivotally mounted in earpieces and extending through an eye or staple. By means of a nut on said tongue the two parts J K of the mold can be drawn together into perfect abutment and locked in that osition. This mold also has an inner tubu ar wall of less diameterthan the combined portions J K, preferably consisting of the three longitudinal segments L M N, hinged together, as shown at c and d, and having a locking device e, similar to the locking device I) just described. These mold-sections J K and L M N are arranged concentrically to each other and preferably mounted upon a common base. The distance between the inner surface of the sections J K and the outer surface of the sections L M N is just equal to the thickness of the composite armored invert D E F H. This mold J K L M N receives the said armored invert and is set up on end. Then a mass of concrete 0 is put into the matrix of said mold between the outer sections J K and the'inner sections L M N and tamped down, the wire netting or mesh I being embedded in the concrete 0 in a circle continuous with that of the wire-netting F. Wire loops G, having at one end o en loops, are fastened at their opposite ends to the wire-netting P. The concrete 0 unites with the concrete layers E and H and forms with it one mass. The curvature of the inner or concave surface of that portion of the sewer-pipe which is composed of the concrete 0 is continuous with the curvature of the exposed surface of the armor D, so that there are formed two diametrically opas the function of giving firm sup .posite longitudinal shoulders, against which the longitudinal edges, respectively, of the armor D abut, as seen in Figs. 4 and 5.

The wires G are bent down, as shown in solid lines in Fig. 4, to fit against the inner surface of the outer portion of the mold. (Shown in Fig. 2.) In like manner the wires G (shown in Fig. 1) should be temporarily bent down in order to fit the mold wherein the invert is formed. The wire loops G are useful to receive derrick-hooks or other apliances to enable the ready handlin of the invert section (shown in Figi) aftert esa-me has been dried-and removed from the mold, and the wire loops G are useful to receive the derrick-hooks or other appliances to en able the ready Handling of the completed sewer-pipe section when it is transported and in lowering the same into position in the trench. 'When this composite tubular sewersection has dried in the mold, (shown in Fig.

2,) it is separated therefrom by unlockingthe devices I) and e and opening'flthe mold-sec tions.

The sewer-section is now ready tobe laid in the trench. The wires G are bent up from theposition 4 to the position shown in dotted lines in said figure.

Foundations Q, of concrete, are laid at intervals in the bottom of the trench in such position that the ends of the sewer-section shown in solid lines in Fig.

may rest thereon. The hooks of the chains of the derricks are inserted in the four eyes of the wires G, and the sewer-section is lowered into the trench, with its ends restinlg' foundation Q, as seen in Fig. 4. 0t er similar sewer-sections R and S are laid with one end of each of them in abutment with the res ective ends of the first-named. seWer-sec tron, as illustrated in Fig. 4, and said adjacent ends are cemented together, thus making said three sewer-sections one continuous 1 e. p Branch pipes T, having. their inner ends properly beveled, may be inserted in said composite sewer-section in holes made therefor at suitable angles, as indicated in Fig. 3.

The wire-netting which is embedded in the concrete, as described, gives added strength to the structure and is especially useful in protecting the pipe from breakage. It also 1 ort to. the wires G, by which the pipe is han led.

Instead of using piecesof stone for the armor, shown at D, sections of curved baked-clay )lates can be used, if desired, or any other suitable material adapted to furnish a durable wearing-srrfaee.

It 'is obvious that instead of making the arch of one mass of chncrete, as shown at H, a complete composite tubular sewer-section can. he made by the use of a proper form. or mold adapted for the purpose, thus constituting a fully lined or armored tubular seWer- I O O pipe; but for general usage I prefer to furnish sewer-pipe composed of pieces of stone held an armor for the invert only. by said concrete and having their exposed o The particular forms of the molds shown surface approximately smooth, said armor in Figs. 1 and 2 .are not essential, but other I abuttingsaid shoulders and having its said forms of molds capable of producing the same I surface continuous with the inner concave or similar results may be used, if desired. surface of the unarmored upper portion of I claim as a novel and useful invention and said sewer-pipe, substantially as specified. 3 5 desire to secure by Letters Patent- 4. The improved portable sewer-pi e here- 1. The improved portable armored invert in described, consisting of a tubular ody of for sewers herein described, consisting of a concrete having two diametrically opposite semitubular molded body of concrete faced longitudinal shoulders, a tubular piece of on its inner or concae side by a layer of a wire-nettin embedded in said concrete, and 40 different and more durable material, suba semitubufar armor on the lower portion or stantially as specified. bottom of said sewer-pipe composed of pieces 2. The improved portable armored invert of stone held bysaid concrete and having for sewers herein described, consisting of a their exposed surface ap roximately smooth, semitubular molded body of concrete, a wiresaid armor abutting said shoulders and hav- 5 netting embedded in said concrete, and a ing' its said surface continuous with the inner facing or lining on the inner or concave side curved surface of the unarmored upper porof said invert'composed of pieces of stone tion of said sewer-pipe, substantially as held by said concrete and having their exspecified. posedL surface approximately smooth and In testimony whereof I afiix my signature 5o continiilous, substalntiallybeis specified. h I in presence of two witnesses.

3. T eirn rove porta esewer-pi e ere-. in described, consistin of a tubular body of FREDERICK SHAW concrete having two iarnetrically opposite Witnesses: longitudinal shoulders, and a semitubular HENRY N. FRANCIS, armor on the lower portion or bottom of said WARREN R. PERoE. 

